The Experts below are selected from a list of 54 Experts worldwide ranked by ideXlab platform
W.e. Bill Forsthoffer - One of the best experts on this subject based on the ideXlab platform.
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Dry Gas Seal Systems
Forsthoffer's Rotating Equipment Handbooks, 2020Co-Authors: W.e. Bill ForsthofferAbstract:This chapter discusses the various aspects of dry Gas Seal Systems. The reliability of critical equipment is dependent on the reliability of each component in every auxiliary System connected with the critical equipment unit. The Gas Seal, as used in compressor applications, affords the opportunity to achieve these objectives. However, the Gas Seal is still part of a System and the entire Gas Seal System must be properly specified, designed, maintained, and operated to achieve the objectives of optimum safety and reliability of the critical equipment. Whenever a Gas Seal System is utilized, the design of the critical equipment by definition incorporates a separate lube oil and Seal System.. The objective of Seal designs is to positively minimize leakage while removing frictional heat to obtain reliable continuous operation of the Seal. In a liquid application, the heat is removed by the fluid which passes between the rotating stationary faces and the Seal flush, and changes from a liquid to a Gaseous state. In a high pressure application, for pressures in excess of 1000 psi, a tandem Seal arrangement or series Seal arrangement is usually used.
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Dry Gas Seal Best Practices
Forsthoffer's Best Practice Handbook for Rotating Machinery, 2011Co-Authors: W.e. Bill ForsthofferAbstract:Publisher Summary This chapter presents the best practices used since the mid-1980s for developing and selecting dry Gas Seal (DGS) Systems of the highest degree of safety and reliability. The dry Gas Seal was marketed as a “simple” solution to Seal oil System reliability issues, but in reality, when one considers all the possible process and operational related issues, its complexity rivals that of the oil Systems. There is no doubt, however, that a properly specified, selected and designed dry Gas Seal System will positively prevent the ingress of oil into the process System and deliver high degrees of safety and reliability. DGS Systems have been used for the past two decades, and are specified by many end users as the Seal of choice for most compressor applications.
John S Stahley - One of the best experts on this subject based on the ideXlab platform.
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dry Gas Seal System design standards for centrifugal compressor applications
2002Co-Authors: John S StahleyAbstract:Dry Gas Seals have been applied in process Gas centrifugal compressors for more than 20 years. Over 80 percent of centrifugal Gas compressors manufactured today are equipped with dry Gas Seals. Despite the 20-year trend of increasing dry Gas Seal applications, an industry accepted standard for Gas Seal support System design does not exist. The American Petroleum Institute (API) has only recently addressed Gas Seal System design in its Standard 614 (1999). This paper proposes a set of Gas Seal System design standards for process Gas centrifugal compressors on the basis of safety, reliability, and economics. This paper presents the philosophy of one centrifugal compressor and dry Gas Seal original equipment manufacturer (OEM) in regard to Gas Seal System design standards. These standards are based on over 20 years of experience in the area of Gas Seal System design, drawing from actual field experience of thousands of compressors. The reader shall recognize, however, that numerous Gas Seal System design philosophies can be applied to achieve the same System objectives.
Shuangxi Li - One of the best experts on this subject based on the ideXlab platform.
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Study of Fault Self-Recovery and Seal Improvement for Centrifugal Compressor
Power, 2010Co-Authors: Weimin Wang, Jinji Gao, Yan Li, Shuangxi LiAbstract:For centrifugal compressor, discharge or suction pressure variations due to process fluctuations or balance drum Seal degradation can result in rotor thrust increasing which may jeopardize thrust bearing and compressor's reliability. Also, the leakage flow through balance drum Seal can seriously affect the efficiency of compressor. Summarizing the characteristic of axial displacement fault about centrifugal compressor and analyzing the mechanical performance of tilt pads thrust bearing, theory of axial displacement fault self-recovery is presented and realized through experimental study. The method presented in this paper monitors the stiffness of oil film and identifies the reason of axial displacement increasing. Also the low leakage feature of Dry-Gas-Seal(DGS), high reliability of labyrinth, and the feasibility of upgrading existing structure are taken into account at the same time to design a combined labyrinth-dry Gas Seal System on the balancing drum. Based on the combined Seal System, a Fault Self-Recovering(FSR) mechanism for the fault of rotor axial displacement is introduced to assure the minimum oil film thickness was ensured in real time. The modern Computational Fluid Dynamics(CFD) and experimental study were used to validate this concept. The result and relevant information indicate that the method can realize axial displacement fault self-recovering effectively and the combined Sealing System could improve the efficiency of the centrifugal compressor about four percent. © 2010 by ASME.
Bai Zhangqi - One of the best experts on this subject based on the ideXlab platform.
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Fault analysis and repair of HRS acid cycling pump in an 800 kt/a sulphur-burning sulphuric acid plant
Sulphuric acid and industry, 2020Co-Authors: Bai ZhangqiAbstract:The structure and operation of Honglin's HRS acid cycling pump are described.The pump was seriously damaged just after 4 month of operation.Severe wear occurred to dynamic and static Seal rings for dry Gas Seal System,mating surface of primary and secondary bushings with shaft bush and upper and lower Sealing rings of impeller.The damaged parts of the acid pump were repaired using laser cladding technology and domestic alloy materials.The acid pump runs well after repair.
Huang Yi-fang - One of the best experts on this subject based on the ideXlab platform.
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Parameters Optimization and Simulation of Grooves with Gas Sealing
Chemical Engineering & Machinery, 2020Co-Authors: Huang Yi-fangAbstract:Making use of the multi-objective optimization method,a coordination function of rigidity-to-spillage ratio was derived;through solving the objective function with Maple program,the optimized geometric parameters were acquired;and basing on the CFD numerical simulation,the geometric model of the flow field was established to make balance calculation and check Sealing performance.The Gas Seal System design for a cascade pump shows that this method can be taken for both optimal design and simulation verification of Gas Seal System.
